Shoe finishing machine



Oct. 18, 1938. c. M. BAGSHAW ET AL SHOE FINISHING MACHINE Filed March 2 4, 1937 3 Sheets-Sheet l JWENTU E WW Oct. 18, 1938. c. M. BAGSHAW ET AL SHOE FINISHING MACHINE 3 Shee ts-Sheet 2 Filed March 24, 1957 fivvE/v 7055: Qam m E1. 15

Oct. 18, 1938. c, M. BAGSHAW El AL 2,133,370

SHOE FINISHING MACHINE Filed March 24, 1937 3 Sheets-Sheet 3 I lnngjgm Patented Oct. 18, 1938 UNITED STATES PATENT OFFICE SHOE FINISHING MACHINE Application March 24, 1937, Serial No. 132,820 In Great Britain April 1, 1936 29 Claims.

invention relates to shoe-finishingv machines. and isillustrated herein as embodied in a.

machine of the type disclosed in United States Letters Patent No. 1,078,684, granted November a yielding member such as a spring, holds the tool.

against the sole edge and is permitted to move soas to maintain contact between the tool and the shoe as difierent portions of the sole edge are presented to the tool. Such movements of the tool head, however, cause similar displacements of the spring and hence changes in the pressure between the shoe and the tool which may be counteracted by mechanism for controlling the above-mentioned spring, of which that disclosed in United States Letters Patent No. 1,412,894,

v granted on April 18, 1922 in the name of J. H.

Rigby, is an example, in orderto render the action of the tool on the work more uniform.

An important object of the invention is to improve control mechanism of this type with a view to insuringgreater uniformity in the pressurebetween the tool and the shoe than has been possible heretofore.

This object is attained in the illustrated ma-- chine by utilizing movement of the tool head, which is determined by the shape of the sole edge, to actuate control means forming an important feature of the invention and mounted and: arranged to cause movement of the yielding memher in the same direction and to the same extent that it is displaced by movement ofthe head. Thus any tendency of the tool pressure to change.

is immediately counteracted with the same effectiveness regardless of the shape of the sole edge member therefore to yield relatively to each other I in response to movement of the tool head with respect to the jack andbodily in. ordertocounteract the change in tool pressure which their relative movement tends to cause.

It may be desirable, in setting. a sole-edge, first to employ a heavy toolpressure to consolidate the fibers of the sole material, and then a much lighter pressure which is more suitable for imparting a highly burnished surface to the sole edge. Accordingly, another important feature of the invention consists of means operable: at a predetermined. stage of the relative movement of the tool and shoe automatically to change the pressure between them. As herein illustrated, this means is arranged to be moved between the operatingv means for the tool head and the control means which maintain the tool pressure constant. so as to vary the operative relation between the operating, means and the control means at the: time it is desired to change the tool pressure. Thus, the state of balance of the operating means for the tool head is temporarily upset until the alternative degree of pressure: has. been reached when the control. means again operates as: before to maintain the. tool pressure constant until. it is again restored to theoriginal amount.

These and other features of the. invention will appear more. fully from the following detailed description when read in connection. with the alccompanying drawings and. will. be pointed out in the appended claims.

In the drawings,

Fig. 1 is a front elevational view of an illustrative edge setting machine embodying the presentinvention, the machine being shown withits parts in the positions which they occupy before an operation is begun on the work;

Fig. 2 is a View illustrating intheir starting posi-' tions parts of the machine in the vicinity and viewed in the direction of the arrow II. in Fig. 1;

Fig. 3 is a plan. View illustrating in their starting positions other parts associated with" the mechanism illustrated in Fig. 2 and viewed in the direction of the arrow III in: Fig. 1;

a Fig. 4 is a front elevational view of the parts seen in Fig. 3;

Fig. 5 is an end view of certain parts in the vicinity and as viewed in the direction of the arrow V in Fig. 2;

Fig. 6 is a plan view of a part of the mechanism illustrated in Fig. 2 but illustrating the positions. which these parts occupy at a-stage in the operation of the machine whena heavy pressure is being applied to the work by the tool:

Fig. '7' is a plan view of a part of the structure illustrated in Fig. 3' but illustrating the positions: which these parts occupy when a heavy pressure is being applied to the work by the tool Fig. 8 is a plan view similar to: Fig. 6 but illustrating the positions which these. parts: occupy ata stage in the operation of themachine when a comparatively light pressure is being applied to the work by the tool;

Fig. 9 is a plan view similar to Fig. 7 but illustrating the positions which these parts occupy when a light pressure is being applied to the work by the tool; and

Fig. 10 is a diagram illustrative of the stages at which certain events occur during the operation of the machine.

The machine illustrated in the drawings comprises a jack J provided with clamping means for a shoe S and actuated, by mechanism described in the Keall et al. patent referred to above, to have a to-and-fro rotary movement to transfer the locality of operation of an oscillatory edge setting tool I to and fro about the forepart of the edge of the outsole of the shoe. During such transfer of the point of operation of the tool I, the tool is automatically maintained in correct relation with respect to the sole edge by the action of feelers 3 and 5 and an abutment I projecting from the tool head II and adapted to bear against the tread surface of the sole.

The machine, in common with usual practice, will be considered as being adjusted so that in each complete cycle of its operation the point of operation of the tool I upon the sole edge is transferred (by reason of rotative movement of the jack J) to-and-fro three times about the forepart of the sole. In Fig. 10 there is indicat-ed a sole S and drawn about the forepart of this sole is a line indicative of the transfer of the point of operation of the tool I that takes place by reason of the movement of the jack J. The tool I begins to operate upon the sole edge at the locality indicated by a. The subsequent movement of the jack causes the point of operation of the tool to travel around the forepart of the sole in the direction of the arrows until the point I) is reached. Then the motion of the jack is reversed and the point of operation of the tool travels around the forepart in the reverse direction until the point is reached, 0 being located somewhat nearer the heel of the sole than is the point a, and being opposite the point b. The point of operation of the tool is transferred to and fro in this manner, reversals taking place at the points (1, e, f and g and the tool ceasing to operate on the sole edge when ;the point It is reached, at which time the extent of the sole edge operated uponhas been subjected, at every point, to three to-and-fro traverses of the tool.

The illustrated machine may be provided with i an automatic device 9 of the type disclosed in an application for Letters Patent of the United States Serial No. 77,740, filed May 4, 1936, in the names of Bagshaw and Harrington, for'applying wax to the sole edge to assist the setting operation. This device functions to apply the wax to the sole edge during the traverse in which the locality of operation of the tool is moving between the points d and e.

Furthermore, as described in Letters Patent of the United States No. 1,693,634, granted December 4, 1928, upon the application of Barclay and Keall, the normal oscillatory movement of the tool is stopped during the last portion of the operation of the tool on the sole edge and the tool operates upon the work with a simple wiping or sleeking action. The oscillation of the tool is stopped at the locality indicated by the point f in Fig. 10.

The tool I is carried by a tool head I I supported on a lever I3 by parallel linkages I5, I and, on

movement of a starting handle I1 to the left from its inoperative position seen in Fig. l, the tool head II is moved toward the left, the lever I3 swinging about its pivot I8, to bring the tool I into engagement with the sole edge and to initiate the to-and-fro rotary movement of the jack J.

The starting handle I! (Fig. 1) is pivoted at I9 to a lever 2I which is pivoted upon a shaft 23 fixed to the frame 24. A stud 25 on the lever 2| passes into an arcuate slot 27 formed in the starting handle Il', while a headed pin 29 fixed in the stud 25 passes laterally through an aperture in the starting handle I l and has a compression spring 3I confined between its head and the handle H. The arrangement described is such that the handle I! and lever 2| normally form a unitary lever movable about the axis of the shaft 23; but when the starting handle I1 is moved to the left in a counterclockwise direction to swing the upper part of the lever I3 and the tool head II toward the shoe S, resistance to such movement is encountered when the tool I engages the shoe, and then the handle I! is moved relatively to the lever 2I about the pivot I9 against the action of the spring 3| until the stud 25 has moved from the left-hand side of the slot 21 to the right-hand side of the slot.

The lever 2I is connected with the lower end of the lever I3 by means of the following arrangement. The lever 2| is provided with a bifurcated lug 33, the two portions of which (only one being visible in Fig. l) are provided with pins 35 engaging in slots 37 formed in two similar links 39 pivoted at their lower ends to a plunger 4I movable, as hereinafter described, in a cylinder 43 fixed to the frame 24. A tension spring 44 connecting the lever 2| and the frame 24 urges the lever 2| and starting handle I! in a counterclockwise direction and initially maintains the pins 35 at the upper ends of the slots 31. Pivotally secured to the plunger 4i is a rod 45 which extends between the links 39, upwardly through a bore in a block 41 pivotally mounted on the lower end portion of the lever I3. A pair of lock nuts 49 threaded on the rod 45, a collar 5I fixed to the rod 45, and a yielding member in the form of a strong compression spring 53 surrounding the rod and housed between the abutments provided by this collar 5| and the lower surface of the block 41 are arranged to hold the block yieldingly at the upper end of the rod 45.

The arrangement described above is such that when the starting handle I1 is moved counterclockwise to the left from the initial position shown in Fig. 1 the pins 35 engage the top of the slots 37 in the links 39 and thereby the plunger M and with it the rod 45 are moved upwardly. Thus, by the thrust transmitted through the spring 53 the lever I3 is moved counterclockwise about its pivot I8 and the tool I approaches the work. So long as no resistance is encountered to the movement of the tool I, the spring 3I will maintain the starting handle I1 and the lever 2I against relative movement. As soon, however, as the tool I encounters the sole edge, the counterclockwise movement of the lever I3 is resisted and if the starting handle I! is now moved farther to the left the spring 3I yields, permitting the handle I! to turn with respect to the lever 2I about the pivot I9. The starting handle I'I below the pivot I9 is pivoted at 55 to the right-hand end of a substantially horizontal bar 51. The relative position of the pivot 55 and the shaft 23 is such that when the starting handle I1 and the lever. II are moving without relative motion about the shaft 23 practically no movement toward the righthand side of the machine is imparted to the bar 51 but when the tool I encounters the sole edgeand the starting handle |'-1. moves relatively to the lever 2| about. the pivot I9, the bar 51 is given a substantial movement toward the right.

The bar 51' (Figs. 3 and 4) is slidably mounted in a recess in a second bar 59; the two bars having pins 6|, 63 respectively thereon connected by a tension spring 65 which normally maintains the two bars in a position in which the end of the bar 59 abuts against a small lug 61 fixed to the bar 51. The two bars 51, 59 are slidably supported between two fixed lugs 69:, 69 on the frame 24, the bars passing through a slot in a block 1| housed between the lugs 69, 69. As seen in Fig. 4, the slot in the block H is shaped to permit the slight degree of angular'motion of the bars 51, 59 which results from movement of the starting handle I1 about the pivot- I9. It is to be noted from Figs. 3 and 4 that the mounting of the bars 51, 59 between the lugs 69, 69 is a floating mounting to the extent that the bars are capable of movement in the direction of projection of the lugs 69, 69 from the frame, the pivot 55. being of a sufliciently loose character to permit some degree of motion of the bars in this direction for a purpose hereinafter made clear.

Figs. 3 and 4 indicate the positions of the bars 51 and 59 before the bar 51 is given its aforesaid movement to the right by actuation of the starting handle I1. The left-hand end portion of the bar 51 abuts against a spring-pressed valve-operating pin 13 which controls flow of oil (from the usual hydraulic circuit of the machine) from an inlet pipe 15 (Fig. 1), through a valve 11 and out through a supply pipe 19 to the cylinder 43 in which the plunger 4| operates. The valve operating pin 13 is initially held in the outward position seen in Fig. 3 under pressure of a spring (not shown), in which position the valve 11 is closed and oil pressure in the pipe 15 is cut of!- from the cylinder 43, the plunger 4| being free to move upon operation of the starting handle I1 as hereinbefore described. The left-hand end portion of the bar 59 bears against an abutment arm 8| at a locality directly opposed to that at which the bar 51 engages the valve operating pin 13, and the position of this arm 8| is accurately controlled by mechanism to be hereinafter described.

When the bar 51 is moved to the right upon actuation of the starting handle I1, an inclined surface 83 formed on the bar 51 and engaging the valve-operating pin 13 moves the latter inwardly into the position which it is shown as occupying in Fig. 7, the valve-operating pin riding up on to a level surface 85 on the bar 5.1 at the left of the inclined surface 83. Thus, the valve-operating pin 13 is moved inwardly since the left ends of the bars 51 and 59 are at this time prevented from moving outwardly on account of the bar 59 being engaged by the arm 8|. This inward movement of the valve-operating pin 13 causes the valve 11 to be opened to allow oil to flow into the cylinder 43 under pressure. During the aforesaid movement to the right of the bar 51, the bar 59 remains substantially stationary, as will be appreciated by comparing Figs. 3 and 7 The abutment arm 8| normally engages the bar 59 near the left-hand end of an inclined surface 81 formed on the bar 59. The bar 59 is prevented from moving to the right in company with the bar 51 (although the. spring 65 will tend to moveit in thisdirection) by the engagement of. a pin 88 (Fig. 4)., projecting from the bar 59, with the block 1|.

As soon as the pressure of the oil is built up in the cylinder 43 on the opening of the valve 11 in the manner just described, the plunger 4| imparts a considerable upward thrust to the rod 45..

The slots 31 in the links 39 allow the links 39 to be moved without interfering with the position of the starting handle I1 which will have been swung over to the left by the operator and. locked.

in operative position as described in the Keall et al. Patent No. 1,078,684, in which position it will be maintained until it is automatically released at the. conclusion of the operation of the machine. During the operating cycle, the tool I will be. in engagement with the sole edge and the power thrust imparted by the plunger 4| to the rod 45 will .act to. compress the spring 53 and cause the tool I to be forced with considerable pressure against the sole edge. The amount to which this pressurev of the tool against the. sole edge rises is controlled by the mechanism which will now be described.

It will be realized that when the tool I is bearing against the. sole edge the length of the spring 59 between the collar 5| and. the block 41 gives a measure of the amount of pressure between the tool and the sole edge. Means is provided which is effective to. control the position of the arm 8|, and consequently the position of the valve-operating pin 13 since the bars 51 and 59 are capable of floating movement in the direction of the axis of the valve-operating pin, in accordance with the length of the spring 53 at any instant and so in accordance with the pressure of the tool on the work. Secured by screws 89 (Figs. 6 and 8) to. the block 41 is a wedge block 9|. A second wedge block 93 is slidably mounted upon the wedge block 9 I, the blocks 9t, 93 being connected by a tongue-and-groove joint at their inclined surfaces, as illustrated in Fig. 5. The wedge block 93. has a link 95 (Fig. 2) pivotally connected to it, which link is also pivotally connected to an arm 91 secured by a screw 99 to the collar 5| on the rod 45. It will be realized that. when the length of the spring 53 is changed the wedge blocks 9|, 93 will slide upon each other and the distance between the forward surface of the wedge block 93 and the axis of the rod 45 will vary, this distance being a function of the length of the spring 53 and so of the pressure of the tool I upon the work; and mechanism will now be described which controls the position of the arm 8| in accordance with variations in the above-mentioned distance.

Fixed to the machine frame is a bracket |0| (Figs. 1 and 2) into which isv threaded a screw I03 carrying a bellcrank lever I05 one arm of which is pivoted to one end of a long link I01 which, at its other end, is pivoted to one arm I09 (Fig. 3) of a bell-crank lever pivoted upon a screw lIll carried by the block 1|. The abutment arm 8| constitutes the other arm of the bell-crank lever last referred to. The arm of the bell-crank lever I05, other than that to which the link I01 is pivoted, has two abutment screws H3 and H5 threaded therein. In the initial position of the parts as seen in Figs. 2 and 5 the end of the screw 3 bears against the forward surface of the wedge block 93 while the end of the screw I I5, which projects farther rearwardly from the bell-crank lever I06v than does the screw I.3,is. receivedina recess H1 in the block 93 and does not contact with the forward surface of the block. The recess II'I extends only a short distance to the left from the righthand side of the wedge block 93 and comes to an end at an inclined surface H9.

When, as already described, upon actuation of the starting handle H, the oil pressure in the cylinder 43 becomes effective to compress the spring 53 and set up a comparatively heavy pressure between the tool I and the work, the consequent shortening of the spring 53 causes the wedge block 93 to slide on the wedge block 9| toward the right from the position shown in Fig. 2. The efiect of this is to cause the screws H3, H5 and the wedge block 93 to take up relative positions as indicated in Fig. 6. The screw H5 has emerged from the recess H1 and now bears against the flat forward surface of the wedge block 93, the screw H3 being separated from the wedge block 93. The arrangement described is such that a state of balance is obtained with the parts in a position like that illustrated in Fig. 6 though, as will be clear from the following description, the pressure exerted by the tool I upon the sole edge when this state of balance is reached is dependent upon the adjustment of the screw H5. The conditions necessary for this state of balance to be attained will best be understood by considering that Fig. 6 shows the actual position of the parts when this balance is reached. Fig. 7 shows the positions of the valve-operating pin 13 and the arm 8| when the wedge blocks 9I, 93 and the bell-crank lever I05 are in'the positions shown in Fig. 6. The valve-operatingpin I3 is at this stage in a critical position in which the slightest movement in one direction will close the valve TI if it be open or the slightest movement in the other direction will open the valve 11 if it be closed. Let it be assumed for purposes of explanation that the valve is in an open position. The oil in the cylinder 43 will therefore be acting on the plunger M and tending to increase the pressure of the tool I against the work. As soon, however, as the spring 53 is compressed to the slightest additional degree, the forward surface of the wedge block 93 is correspondingly moved inwardly toward the axis of the rod 45. The screw H5 is then permitted to move correspondingly inwardly and through the parts described the arm BI is then permitted to be moved correspondingly outwardly. The spring which controls the valve-operating pin I3 urges this pin outwardly and, since the abutment 8| is per-' mitted to move outwardly, the pin '13 will, together with the bars 51, 59, move outwardly and the valve 11 will be closed, relieving the pressure of the oil in the cylinder 43. The spring 53 .will then immediately begin to expand but before it has done so to more than a very slight degree the forward surface of the wedge block 93 will, by moving correspondingly outwardly, have operated the parts described to cause the arm 8I to move correspondingly inwardly, thereby effecting reopening of the valve 11. When the state of balance is reached such a small movement of the valve-operating pin I3 is effective to open or close the valve that the effect of the arrangement just described can for practical purposes be regarded as maintaining the pressure between the tool I andthe sole edge at a substantially constant value. It will be realized that the actual value of the pressure when the state of balance occurs is dependent upon the adjustment of the screw H5. If this adjustment is varied the position of the arm BI is correspondingly altered and thus the wedge blocks 9 I, 93 will occupy a different position (and consequently the spring 53 will be at a different degree of compression) when the valve-operating pin 13 is maintained in its aforesaid critical position. v

It will furthermore be appreciated that when the parts are in the aforesaid state of balance the pressure between the tool I and sole edge will be maintained substantially constant despite the tendency of the varying contour of the sole edge to produce a change in pressure. As the jack J of the machine rotates it will be realized that the varying contour of the sole edge causes the tool head II and consequently the lever I3 to move to and fro somewhat as the tool I maintains itself in contact with the sole edge. Such movements of the head cause similar displacements of the spring 53 which tend to produce undesirable variations in the pressure of the tool against the sole edge at different localities of the sole edge. However, on account of the operation of the pressure control mechanism above described, immediately upon a displacement of the spring 53, with respect to the rod 45, the valve 11 is opened or closed, as the case may be, and hence changes in the length of the spring 53 are immediately counteracted by bodily movement of the spring 53 and rod 45 whereby the tool pressure is maintained substantially constant.

At a stage of the operation of the tool I. upon the shoe which, though capable of adjustment, will ordinarily be represented by the point d in Fig. 10, the pressure between the tool I and the sole edge is automatically reduced to a considerably smaller value for the purpose hereinbefore mentioned. Assuming, as aforesaid, that the machine is equipped with the waxing device 9 which is adjusted automatically to apply wax to the sole edge while the point of operation of the tool on the work is traveling between the points d and e, the screw H5 will be so adjusted that, while the point of operation of the tool on the work is traveling between the points a and d, the pressure between the tool and the unwaxed sole edge will be of that considerable value which it has been found desirable for obtaining the best consolidating or setting effect upon an unwaxed edge but which is ordinarily undesirably heavy to apply to the waxed sole edge for obtaining a highly burnished surface. The arrangement of parts for eifecting an automatic reduction of the pressure of the tool I on the sole edge is as follows.

As best shown in Fig. 4, a tooth I 2I is formed on the upper surface of the bar 59. At the stage at which the pressure of the tool I upon the sole edge is to be reduced, this tooth i2I is engaged by a tooth I23 formed upon a link I25, operated as later described, and the bar 59 is thereby moved to the left to vary the operative relation between the valve-operating pin 13 and its control means so that the parts take up the positions illustrated in Fig. 9. During such movement of the bar 59 to the left the bar 51 does not accompany it and the valve-operating pin '53 continues to engage the surface 85. The bar 59 moves to the left until a position is reached at which a pawl I21, pivotally mounted upon the bar 51 and urged in a counterclockwise direction as viewed in Figs. 3, 6 and 9 by a spring I29 housed between it and a lug I3I on the bar 51, latches into a recess I33 formed in the bar 59, thereby holding it against the action 0f the spring 65. As the bar 59 is moved to the left, on account of its inclined surface 81, the effective width of the portion of the bars 51., 59 which intervenes between the valve-operating pin 13 and the arm :81 is decreased. Thus, the arms 51, 59 will be permitted to move outwardly, thereby allowing the valve-operating pin 13 also to move outwardly closing the valve 11 and .destroying the aforesaid state of balance. When this occurs, however, the spring 53 will begin to expand and therefore "the wedge block 93 will slide upon the wedge block 91 into the position illustrated in Fig. 8, in which the end of the screw I I5 has moved into the recess H1 and the screw H3 is in contact with the forward :surface of the wedge 93. On account of the corresponding outward movement of the forward surface of the wedge block 93 the tbell crank lever 1115 will be turned in the clockwisedirection '(afiligs. 2 and 8) and the arm BI (Fig. 3) moved toward the valve-operating pin 13 until a stage .is reached at which the valve-operating pin 13 has been once more pushed inwardly until it occupies its critical position :and a new state of balance is attained. This stage 'of affairs is illustrated in Fig. 9. By comparing Figs. '7 and 9, which represent the positions of the parts respectively at the first and second states of balance, it will be appreciated that, on account of the change in the effective width of the "bars 51,-, 59 in Fig. 9, the arm 8! occupies a more inward position .in the second state 'of balance than it does in the first, Consequently in the second state 'of balance the length of the spring 53 is greater than it is in the first and therefore the pressure between the tool I and the sole edge is less in the second state 'of balance than it is in the first. Otherwise the second :state 'of balance is similar to the first in that the pressure is maintained a substantial constant value in the second state despite variations in the sole edge contour. Moreover, it will be clear that the value of the pressure in the second .state of balance can :be varied by adjustment of the screw H3 in "a similar manner to that already described .in which the value of the pressure in the first state of balance may be varied by adjustment of the screw H5. The described arrangement in which two screws H3, H5 are provided thus enables the value of the high pressure in the first state of balance and of the low pressure in the :second state of balance to be separately adjusted. desired, however, only one screw may be employed. Thus, the screw H5 may be removed completely, leaving the screw =II-3 to operate alone. If this be done, however, it is not then possible to adjust the values of the high and low pressures separately but alteration in the setting of the screw H3 :is effective to change, by this single adjustment, both the value of the high pressure and the value of the low pressure.

The mechanism for actuating the link I25 to cause movement of the bar 59 to the left will now be described. At its left-hand end the link is pivoted to an arm l35 (Fig. 1) fixed on a short rockshaft -l31 pivotally mounted in a bearing in the machine frame. Near the base of the ma chine there is mounted :a lever 43S which corresponds to the lever referred to as IE0 in the Keall et al. .Patent No. 1,078,684. This lever, like the lever I68, has a to-and-fro movement about its pivot Mt imparted to it each time that the direction of movement of the jack of the machine is reversed.

The lever I39 has fixed to its left-hand end an extension 'I4I which reaches to the end of a second arm I43 fixed to the rockshaf-t I 31. A spring I45 connected to a part hereinafter described serves to hold the arm I 43 abutting against the extension I and the arrangement is such that, when the lever I39 is oscillated about its pivot .140 at each reversal of the jack J, the ro'ckshaft I31 and also the arm I35 is oscillated. This carries the link I25 to the left from its position illustrated in Fig. :1 and then back again. Means is provided, however, whereby the link I25 is brought into such position that its tooth I23 can engage the tooth IQ! 'for the purpose already described only at the particular jack reversal at which it is desired to reduce the pressure of the tool I against the sole edge. To this end, the machine is provided with an arm I41 carried 'by a shaft I49, which arm and shaft respectively correspond to the arm and shaft referred to as 302 and 290 in the Barclay 'et al. Patent No. 1,693,634. The arm I41 is pivotally connected to a bar I5I which corresponds to the bar referred to as 303 in the last-mentioned patent. The members I41 and I 5 I form part of the mechanism for stopping the oscillation of the tool -I during the last portion of the traverse of the tool and work, and in the operation of the machine the arm I41 is rotated clockwise in successive steps as traverses take place between the jack J and the tool 1. Thus, the left-hand end of the bar I-5I adjacent to the arm I41 is lowered in successive steps as the traverses proceed. This movement 'of the left-hand end of the bar 'I5I is em ployed to effect engagement between the teeth I21, I23 only at the desired time. For the purpose in question a link I53 is pivoted at its lower end to the right-hand end of the link I25 and this link 1-53 has a slot 155 therein in which engages a pin I51 projecting forwardly from the :bar I5;-I. An adjusting screw I59 is so threaded into the upper end portion of the link I53 that its end provides an adjustable upper limit to the extent of'the slot 155, while a compression spring -I6I housed in the slot bears at its lower end against the lower 'end of the slot and at its upper end against the pin 1'51, thereby tending to main- 'tain the pin against the end of the screw :I-59. The tension spring referred to above is stretched between a pin I53 on the link =I-53 and a pin I65 on the frame 2-4 and urges the link I53 toward the right and thereby maintains the arm M3 in contact with the extension ML The above described mechanism will ordinarily be so adjusted that, at the time that the jack reversals indicated by the points 1) and c in Fig. .10 take :place, the corresponding oscillations of the arm I35 and consequent to-and-fro movements of the link I25 are ineffective to cause the aforesaid movement of the bar 59 to the left since at these reversals the tooth I23 on the link I25 will be located so far above the tooth .I2I that .no engagement takes place between them. However, when the jack reversal indicated by the point at in .Fig. 10 takes place the left-hand end portion of the bar -I5-I will at this stage have descended sufliciently from its initial position to enable the tooth I23 to engage the tooth -I2I, whereupon the bar 59 is moved to the left and the high pressure of the tool I on the work is reduced to the low pressure. should it be desired that the pressure change should occur at a jack reversal different from that indicated by the point d, the result maybe effected by suitable adjustment of the screw 159 It will be appreciated, however, that since this controls the level of the tooth I23. It will be understood also that once the bar 59 has been moved to the left and latched in position by the pawl I21 the tooth I23 moves idly on subsequent to-and-fro movement and the spring IBI will permit the link I53 and consequently the right-hand end portion of the link I25 to move upwardly to prevent damage to the parts when the tooth I23 engages the upper surface of the bar 59.

At the end of the operation of the machine, the starting handle will be automatically released from the operative position in which it has been locked, the said release being accomplished by mechanism corresponding to that described for the same purpose in the Keall et al. Patent No. 1,078,684. There upon the starting handle I1 (Fig. 1) is permitted to turn about the pivot I9 relatively to the lever 2I until the left-hand side of the slot 21 engages the stud 25. This movement of the starting handle I1 is effective to cause the bar 51 to move toward the left. The bar 59 is at this stage latched by the pawl I21 (Fig. 9) to the bar 51 and partakes of the movement of the bar 51 to the left until the tail of the pawl I21 engages a fixed abutment I61 on the machine frame. The pawl is then removed from the recess I33, thereby permitting the spring 55 (Fig. 4) to carry the bar 59 into its initial position with respect to the bar 51. The movements just referred to of the bars 51, 59 bring them into the relation illustrated in Fig. 3 and on account of the movement of the incline 83 away from the valve-operating pin 13, the latter is permitted to move outwardly to close the valve 11. Thereupon the pressure of the oil in the cylinder 43 is relieved and the spring 53 expands to relieve the pressure of the tool I upon the sole edge. Finally when the pressure is relieved a tension spring I69 (Fig. 1) connected to a point on the frame (not shown) and a pin I1I secured to the block 41 become effective to swing the lever I3 clockwise to carry the tool head II away from the work into the initial position seen in Fig. l; and at the same time the rod 45 is moved downwardly and the starting handle I1 and lever 2I are carried into their initial positions.

From the above description of the construction and operation of the illustrated machine it will be realized that the invention provides fully automatic means arranged to change the pressure of the tool against the work at any desired stage in the operation of the machine. This result, as has hereinbefore been explained, is highly advantageous in obtaining both a hard and highly finished sole edge whether the machine is equipped with an automatically operating waxing device of the type disclosed in the Bagshaw and Harrington application. Serial No. 77,740 or not. Moreover, the maintenance of a particular pressure at a substantially constant value is ensured despite the tendency of the varying contour of the sole edge to change the pressure as the jack rotates to cause a traverse of the sole edge by the tool. Furthermore, it will be appreciated that the pressure of the tool against the sole edge may be. altered simply by adjustment of the screw 1 I3 or of the screw I I5 without manually altering the degree of compression of the heavy spring 53.

The term fluid system, as used hereinafter in some of the claims, is to be understood as including both the container of the fluid which comprises the pipes, valve and cylinder, and the fluid in the container.

Having described our invention, what we claim as new and desire to secure by Letters Patent of the United States is:

1. In a finishing machine, a tool head, a shoe jack, said jack and head being relatively movable to transfer the point of operation of the tool on the shoe about its sole edge, said head being mounted for movement with respect to said jack thereby to maintain contact between the tool and sole edge throughout their relative movement, operating means for urging said head toward said jack, and means actuated by movement of said head with respect to said jack for controlling said operating means thereby to regulate the pressure between the tool and sole edge.

2. In a finishing machine, a shoe jack, a tool head carrying an edge setting tool and mounted for movement with respect to said jack, said tool and jack being relatively movable to cause a transfer of the point of operation of the tool on the shoe about its sole edge, means for operating said head to hold said tool against the shoe, said means comprising a member mounted to yield in response to the movement of said head with respect to said jack, and connections actuated by movement of said yielding member for controlling said operating means so as to equalize the pressure of said tool against the shoe.

3. In a finishing machine, a tool head, a shoe jack mounted to rotate to and fro thereby to present the sole edge of a shoe thereon. progressively to said head, said head being adapted to be moved toward and away from said jack by the shoe as it is rotated by said jack, a yielding member arranged to resist movement of said head away from said jack, a support for said yielding member, operating means for said support, and control means actuated by movement of said yielding member constructed and arranged to cause said operating means to move said support in the direction of movement of said yielding member thereby to maintain a substantially constant pressure between said head and the shoe.

4. In a finishing machine, a tool head carrying a tool adapted to operate upon the sole edge of a shoe, a shoe jack mounted to move to and fro thereby to present the sole edge of a shoe thereon progressively to said head, said head being mounted to move toward and away from said jack as the shoe is moved by said jack, a yieldable member arranged to resist movement of said head away from said jack and adapted to be displaced by movement of said head, supporting means operable tomove said member when the latter is displaced by said head thereby to maintain substantially constant the pressure between said tool and shoe, and control means actuated by displacement of said member for operating said supporting means.

5. In a finishing machine, a tool head carrying a tool adapted to operate upon the sole edge of a shoe, a jack for a shoe, said head and jack being mounted for relative movement to transfer the point of operation of the tool on the shoe about its sole edge, said head being mounted to move with respect to said jack during their relative movement, a spring mounted and arranged to resist movement of said head away from said jack, a movable support for said spring, operat ing means for moving said support, and means connecting said support and spring actuated by a change in length of said spring to cause said operating means to move said support so as to counteract the change in length of said spring.

6. In a finishing machine, a shoe jack, a tool head carrying a finishing tool and mounted for "to hold said tool in engagement with the sole edge,

movement with respect to said jack, said "ljack and tool being mounted for relative movement to transfer the point of operation of the tool'on the shoe about its sole edge, operating means for said head comprising members mounted :and arranged to yield bodily and with respect to each other, and means for controlling said operating means arranged to utilize the relative movement between said members to cause their bodily movement.

7. In a finishing machine, a shoe jack, a tool head, said jack being movable progressively to present the sole edge of ashoe thereon to the tool, operating means for said head mounted :and arranged yieldingly to hold said tool'in engagement with the sole edge, said means comprising a plunger and a member arranged to yield in response to movement of .said head with respect to said jack, and control :means for said operating means mounted and arranged to utilize the movement of said member to :cause said plunger to be moved in the same direction.

'8. In a finishing machine, .a shoe jack, a tool head having :a finishing too], said jack and said head being mounted for "relative movement to transfer the point of operation of the tool on the shoe about its sole edge, an arm carrying said head and mounted for movement with respect to said jack thereby to maintain contact between the tool and shoe "throughout their relative movement, a yielding member adapted to .be displaced by movement of said arm, a supporting member for said yielding member, and means actuated by displacement of said yielding member mounted and arranged to move said supporting member in the same direction.

9. In a finishing machine, a shoe jack, a tool "cad having a finishing tool, said jack and said head being mounted for relative movement to transfer the point of operation of "the tool on the shoe about its sole edge, an arm carrying said head and mounted for movement with respect to said jack thereby to maintain contact between "the tool and shoe throughout their relative movement, a spring acting upon said arm 'yieldingly to hold the tool against the sole edge, operating means for said head comprising a movable supporting member for said spring, and means for controlling said operating means actuated by movement of said arm to cause said supporting member to be moved so as to counteract changes in the stress of said spring caused by movement of said arm.

10. In a finishing machine, a tool head having a tool adapted to operate upon the sole edge of a shoe, a jack for a shoe, :said head and 'jack being relatively movable to transfer the point of operation of the tool on the shoe about its sole edge, said head being movable with respect to said jack thereby to maintain contact between said tool and shoe, means for resisting movement of said head away from said jack comprising members mounted and arranged to move bodily and with respect to each other, a fluid system for opcrating one of said members and having a control valve, and connections actuated by the movement of said members with respect to each other for operating said control valve to cause bodily movement of said members.

ll. In a finishing machine, a tool :head carrying a tool adapted to operate upon the sole edge of a shoe, a jack for the shoe, said head and jack being relatively movable to transfer the point of operation of the tool upon the shoe about its sole edge, means for operating .said head yielding ly said means comprising a plunger and a yielding member, a fluid system cooperating with said plunger to support said yielding member, said fluid system comprising a valve arranged to control the fluid pressure on said plunger, and control means actuated by movement of said yielding member with respect to said plunger Pfor operating said valve so as to move said plunger in the direction of the yielding movement of said member.

.12. In a finishing machine, a tool head carrying atocl adapted to operate upon the sole edge of a shoe, a jack for the shoe, said head and jack being relatively movable to transfer the point of operation of the tool upon the shoe about its sole edge, operating means for said head'comprising a pair of members mounted and arranged to move bodily and with respect to each other, a

fluid system cooperating with one of said mem- L bers to support the other member, said fluid system comprising a valve arranged to control the pressure exerted on the supported member, mechanism actuated bymovement of the members with respect to each other for operating said valve so as to cause bodily movements of said members, said mechanism comprising relatively movable control members coupled with the aforesaid pair or members, and a valve operating member actuated by relative movement of said control members.

13. In a finishing machine, a jack for a shoe, a tool head having a finishing tool adapted to operate upon the sole edge of a shoe, :said jack and head being mounted for relative movement to transfer the point of operation of the tool on the shoe about its sole edge, :said head being mounted for movement with respect to said jack thereby to maintain contact between the tool and shoe throughout their relative movement, means for operating said head to hold said tool against the sole edge comprising a member arranged to yield in response to movement of said head with respect to said jack, and means for controlling said operating means comprising connections arranged to slide at an angle to the direction of the yielding movement of said member.

14. In a finishing machine, :a jack for a shoe, a tool head having a finishing tool adapted to operate upon the sole edge of a shoe, said jack and head being mounted for relative movement to transfer the point of operation of the tool on the shoe about its sole edge, said head being mounted for movement with respect to said jack thereby to maintain contact between the "tool and shoe throughout their relative movement, operating means for said head comprising members mounted and arranged to yield bodily and with respect to each other, and means comprising wedge connections actuated by movement of said members with respect to each other for control-ling said operating means so as to cause one of said members to be moved bodily.

15. In a finishing machine, a tool head carrying a tool adapted to operate upon the sole edge of a shoe, a jack for a shoe, said head and jack being relatively movable to transfer the point of operation of the tool about the sole edge, operat ing means for said head constructed and arranged yieldingly to hold the tool against the sole edge I and to permit yielding movement of said head with respect to said jack, said operating means comprising fluid pressure mechanism having a control valve, and connections actuated by movement of said head with respect to said jack to operate said valve so as to cause a change in the fluid pressure in said mechanism.

16. In a finishing machine, a tool head carrying a sole-edge-finishing tool, a shoe jack movable progressively to present the sole edge of a shoe thereon to said tool, said head being mounted to move with respect to said jack in response to pressure of the shoe against the tool, a spring mounted and arranged to urge said head toward said jack and to yield at one end in response to movement of said head toward and away from said jack, a movable support for the other end of said spring, a fluid system comprising a valve for moving said support, and means for controlling said valve actuated by yielding movement of said spring to cause said fluid system to move said support in the same direction and to substantially the same extent as the yielding end of said spring is moved by said head.

17. In a finishing machine, a tool head carrying a sole-edge-finishing tool, a shoe jack movable progressively to present the sole edge of a shoe thereon to said tool, said head being mount ed for movement toward and away from said jack in response to the pressure of the shoe against the tool, a member cooperating with said head to hold said tool against the shoe and adapted to yield as said head is moved with respect to said jack, fluid-operated means for supporting said member comprising a valve, and control means for said valve actuated by said movement of said yielding member to cause said fluidoperated means to counteract the yielding movement of said member.

18. In a finishing machine, a tool head carrying a tool adapted to operate upon the sole edge of a shoe, a jack for a shoe, said head and jack being relatively movable to transfer the point of operation of the tool about the sole edge, said head being adapted to be moved toward and away from said jack, operating means for said head comprising fluid pressure mechanism and a spring adapted to be displaced by movement of said head with respect to said jack, and connections actuated by displacement of said spring for operating said mechanism so as to cause a change in the fluid pressure therein opposite to the change in the stress of said spring caused by its displacement.

19. In a finishing machine, a tool head carrying a tool adapted to operate upon the sole edge of a shoe, a jack for a shoe, said head and jack beingrelatively movable to transfer the point of operation of the tool about the sole edge, said head being mounted to move toward and away from said jack thereby to maintain contact between the tool and shoe throughout their relative movement, operating means for said head comprising a spring adapted to be displaced as said head is moved with respect to said jack, fluid pressure mechanism comprising a plunger and arranged to support said spring, and means actuated by displacement of said spring for controlling said mechanism to cause a movement of said plunger in the same direction as the spring is displaced.

20. In a finishing machine, a tool head carrying a sole-edge-finishing tool, a shoe jack movable progressively to present the sole edge of a shoe thereon to the tool, means for operating said head to cause said tool to be held against the sole edge, means for controlling said operating means so as to maintain the pressure of the tool upon the sole substantially constant throughout a part of the finishing operation,

and means for changing, for the remainder of the finishing operation, the operative relation between said operating means and control means thereby to change the pressure of the tool against the sole edge.

21. In a finishing machine, a tool head carrying a tool adapted to operate upon the sole edge of a shoe, a jack for a shoe, said head and jack being relatively movable to transfer the point of operation of the tool back and forth about the sole edge, means cooperating with said head to hold said tool in engagement with the sole edge, said means comprising fluid pressure mechanism having a control valve and a member between the head and the fluid pressure mechanism, and connections between said member and valve arranged to be operated at a predetermined stage in the relative movement of said jack and head to cause the pressure between said tool and the shoe to be changed.

22. In a finishing machine, a jack for a shoe, a tool head carrying a tool adapted to operate upon the sole edge of the shoe, said jack being mounted for movement to and fro to cause the sole edge to be progressively presented to the tool, operating means for said head arranged to hold the tool against the sole edge and to permit said head to move toward and away from said jack, means actuated by movement of said head toward and away from said jack for controlling said operating means so as to cause the pressure of the tool on the sole to be maintained substantially constant, and connections between said operating means and control means mounted to move between different positions thereby to vary the pressure of the tool against the shoe.

23. In a finishing machine, a tool head carrying a sole-edge-finishing tool, a shoe jack movable progressively to present the sole edge of a shoe thereon to the tool, said head being mounted for movement toward and away from said jack thereby to maintain contact between the tool and shoe as it is moved by said jack, operating means acting upon said head to urge said tool against the sole edge, means for controlling said operating means thereby to maintain a substantially constant pressure between the tool and the shoe, and connections between said operating and said controlling means for changing the pressure between said tool and shoe, said connections comprising members movable at a predetermined stage in the movement of said jack to vary the operative relation between said operating means and control means.

24. In a finishing machine, a tool head carrying a sole-edgefinishing tool, a shoe jack movable progressively to present the sole edge of a shoe thereon to said tool, said head being adapted to be moved toward and away from said jack as the latter is moved thereby to maintain contact between said tool and shoe, operating means for said head comprising a yielding member arranged to cause said tool to be held against the shoe and to yield as said head is moved with respect to said jack, and means for controlling said operating means actuated by movement of said yielding member to maintain substantially constant 1 the pressure of the tool against the shoe, said con trolling means including members movable relatively to each other to cause said operating means to change the pressure of the tool against the shoe.

25. In a finishing machine, a tool head carrying a tool adapted to ope-rate upon the sole edge of a shoe, a jack for a shoe, said head and jack being relatively movable to transfer the point of operation of the tool about the sole edge, said head being adapted to be moved toward and away from said jack, a yielding member mounted and arranged to resist movement of said head away from said jack and to be displaced by movement of said head with respect to said jack, a support for said yielding member, operating means for said support comprising an actuating member, control means actuated by displacement of said yielding member to cause said operating means to move said support in the same direction thereby to maintain substantially constant the pressure between the tool and shoe, said control means comprising an abutment opposite to said actuating member, and connections mounted for movement between said actuating member and abutment thereby to change the pressure between said tool and shoe.

26. In a finishing machine, a tool head carrying a sole edge finishing tool, a shoe jack movable progressively to present the sole edge of a shoe thereon to the tool, means for operating said head to cause said tool to be held against the sole edge, means for controlling said operating means so as to maintain the pressure of the tool upon the sole substantially constant throughout a part of the finishing operation, and means for chang ing, for the remainder of the operation, the operative relation between said operating means and said controlling means to change the pressure of the tool against the sole edge, said controlling means again becoming effective at the completion of the changing operation to maintain the newly determined pressure substantially constant throughout the remainder of the finishing operation.

27. In a finishing machine in which different pressures are applied to sole edges during a finishing operation, a tool head carryinga sole edge finishing tool, a jack for a shoe, means for moving said jack to-and-fro a plurality of times to cause the point of operation of the tool on the sole edge to be transferred thereabout a plurality of times, means for operating said head to cause said tool to be held against the sole at a predetermined pressure during the initial part of the edge settin operation, and means for controlling the operating means to change the pressure applied to the tool throughout the remainder of the edge setting operation.

28. In a finishing machine in which difierent pressures are applied to sole edges during a finishing operation, a tool head carrying a sole edge finishing tool, a jack for a shoe, means for moving said jack to-and-froa plurality of times to cause the point of operation of the tool on the sole edge to be transferred thereabout a plurality of times, means for operating said head to cause said tool to be held against the sole edge, means for controllin said operating means so as to maintain the pressure of the tool and the sole substantially constant, and means actuated by said jack moving means at a predetermined point during the to-and-fro movement of the jack for changing the operative relation between the operating means and the controlling means thereby to change the pressure applied to the tool throughout the remainder of the edge setting operation.

29. In a finishing machine in which a finishing operation is carried out in a plurality of stages, each stage comprising at least one traverse of a sole edge by a tool, and in which different pressures are applied to the sole edge in the different stages, a tool head carrying a tool adapted to operate upon the sole edge, a jack for a shoe, means for moving said jack to-and-fro a plurality of times to cause the point of operation of the tool on the sole edge to be transferred thereabout a plurality of times, means for operating the head to cause said tool to be held against the shoe edge, means for controlling said operating means so as to maintain the pressure of the tool on the sole edge substantially constant during each operative stage, and means operative between successive stages of the finishing operation to change the operative relation between said operating means and the pressure controlling means to change the pressure between the tool and the shoe edge for the succeeding stage.

CHARLES MARTIN BAGSHAW. ALFRED HARRINGTON. 

